Objectively measured physical activity and psychosocial functioning in young children: The GECKO Drenthe cohort

ABSTRACT

The global trend in inactivity in children may be related to psychosocial problems. We investigated the cross-sectional association between physical activity (PA) levels and psychosocial functioning in 3.4–7.3-year-old children. Children from the Dutch GECKO birth cohort (N = 898; 51.6% boys) had PA levels assessed objectively by accelerometry (ActiGraph GT3X) for at least three days. Linear regression analysis was used for associations with psychosocial functioning (parent report of the Strengths and Difficulties Questionnaire), controlling for gender, age and socio-economic status. Higher total and moderate-to-vigorous PA levels (MVPA) were associated with higher Total Difficulty scores, and sedentary time to lower Total Difficulty scores. More time spent in MVPA was significantly associated to “hyperactivity/inattention” in both boys (Standardized B_BOYS = 0.192) and girls (Std.B_GIRLS = 0.139) whereas for the time in sedentary behaviour, a reverse association was found only in boys (Std.B_BOYS = ?0.230). In boys only, more time in MVPA (Std.B_BOYS = 0.154) and less time in sedentary behaviour (Std.B_BOYS = ?0.147), were significant determinants for ‘behavioural problems’. When using objectively measured PA, parents report more hyperactivity/inattention and behavioural problems in the more active children, and less in the more sedentary children, most clearly for boys. High levels of PA might be an indicator of psychosocial problems in young children.     

The Contextual Benchmark Method: Benchmarking e-Government services

This paper offers a new method for benchmarking e-Government services. Government organizations no longer doubt the need to deliver their services on line. Instead, the question that is more relevant is how well the electronic services offered by a particular organization perform in comparison with those offered by others. Benchmarking is currently a popular means of answering that question. The benchmarking of e-Government services has reached a critical stage where, as we argue, simply measuring the number of electronic services is not enough and a more sophisticated approach is needed. This paper details the development of a Contextual Benchmark Method (CBM). The value of CBM is that it is both benchmark- and context-driven.     

Increased physical education at school improves the visual-spatial cognition during adolescence

The main goal of this study was to investigate the influence of an established school programme with a high amount of physical education on visual-spatial ability in a secondary school. One hundred and forty-four adolescents, 69 from sport classes and 75 from regular classes, solved a cognitive processing speed task and a mental rotation task. The results reflect a better cognitive processing speed of the boys in the sports classes compared to regular classes but no differences for girls. Concerning the mental rotation performance, we found a significantly better mental rotation performance for boys and girls in the sports classes compared to regular classes due to an increased number of items worked on. Supposedly, motor expertise facilitates mental rotation performance by promoting a faster editing of the task. The benefits of sport classes in normal high school settings have to be investigated in further studies considering the effect on academic performance.     

DEVELOPING PROBLEM SOLVING SKILLS

Some complex societal problems such as sudden changes in Eastern Europe or the problem of AIDS are very hard to handle. Even defining the problem is difficult. Managers and experts often lack the knowledge and training to handle these kinds of problem, although the problems require intensive effort. Education typically offers few opportunities for learning how to handle them. Research on Artificial Intelligence mostly focuses on problems in stable situations which have already been solved, and ignores as yet unsolved problems in rapidly changing situations. Before a problem can be solved, it has to be defined: System dynamic modelling can be a powerful tool for doing this. Defining the kind of problem discussed here also requires teamwork: Managers and experts can learn to define a complex problem in a special learning environment involving cases embedded in free form games.     

A study of medical and health queries to web search engines

This paper reports findings from an analysis of medical or health queries to different web search engines. We report results: (i). comparing samples of 10000 web queries taken randomly from 1.2 million query logs from the AlltheWeb.com and Excite.com commercial web search engines in 2001 for medical or health queries, (ii). comparing the 2001 findings from Excite and AlltheWeb.com users with results from a previous analysis of medical and health related queries from the Excite Web search engine for 1997 and 1999, and (iii). medical or health advice-seeking queries beginning with the word 'should'. Findings suggest: (i). a small percentage of web queries are medical or health related, (ii). the top five categories of medical or health queries were: general health, weight issues, reproductive health and puberty, pregnancy/obstetrics, and human relationships, and (iii). over time, the medical and health queries may have declined as a proportion of all web queries, as the use of specialized medical/health websites and e-commerce-related queries has increased. Findings provide insights into medical and health-related web querying and suggests some implications for the use of the general web search engines when seeking medical/health information.     

How are we searching the World Wide Web? A comparison of nine search engine transaction logs

The Web and especially major Web search engines are essential tools in the quest to locate online information for many people. This paper reports results from research that examines characteristics and changes in Web searching from nine studies of five Web search engines based in the US and Europe. We compare interactions occurring between users and Web search engines from the perspectives of session length, query length, query complexity, and content viewed among the Web search engines. The results of our research shows (1) users are viewing fewer result pages, (2) searchers on US-based Web search engines use more query operators than searchers on European-based search engines, (3) there are statistically significant differences in the use of Boolean operators and result pages viewed, and (4) one cannot necessary apply results from studies of one particular Web search engine to another Web search engine. The wide spread use of Web search engines, employment of simple queries, and decreased viewing of result pages may have resulted from algorithmic enhancements by Web search engine companies. We discuss the implications of the findings for the development of Web search engines and design of online content.     

Student teachers’ participation in learning activities and effective teaching behaviours

Teacher learning is essential to the teaching profession, because it has been strongly linked to improved teaching practices and teacher quality. The source for teacher learning is initial teacher education, a crucial phase in the learning-to-teach continuum. To gain insight into this influential period for student teachers’ long-term professional lives, this exploratory study investigates student teachers’ participation in learning activities and explores whether it is connected to their own effective teaching behaviours in a school-based teacher education setting for secondary education in the Netherlands. The results indicate that student teachers vary in their self-reported learning and that this learning relates positively to observations of their effective teaching behaviour. These findings have several implications for teacher education programmes that aim to enhance the likelihood that their student teachers will become career-long learning professionals.     

Time series analysis of a Web search engine transaction log

In this paper, we use time series analysis to evaluate predictive scenarios using search engine transactional logs. Our goal is to develop models for the analysis of searchers’ behaviors over time and investigate if time series analysis is a valid method for predicting relationships between searcher actions. Time series analysis is a method often used to understand the underlying characteristics of temporal data in order to make forecasts. In this study, we used a Web search engine transactional log and time series analysis to investigate users’ actions. We conducted our analysis in two phases. In the initial phase, we employed a basic analysis and found that 10% of searchers clicked on sponsored links. However, from 22:00 to 24:00, searchers almost exclusively clicked on the organic links, with almost no clicks on sponsored links. In the second and more extensive phase, we used a one-step prediction time series analysis method along with a transfer function method. The period rarely affects navigational and transactional queries, while rates for transactional queries vary during different periods. Our results show that the average length of a searcher session is approximately 2.9 interactions and that this average is consistent across time periods. Most importantly, our findings shows that searchers who submit the shortest queries (i.e., in number of terms) click on highest ranked results. We discuss implications, including predictive value, and future research.